SV550 122MM Triplet APO Full Reviews
The biggest attraction of the SV550 122MM is its large diameter of 122mm, which is the upper limit for an easily operable refractor. With this aperture, you will never feel that it is not enough for a refractor. The F-value "7" is versatile, suitable for both visual and photographic purposes. You will be able to use it for various purposes without any complaints. Read More